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    <title>
      Choosing a JRE for a launch configuration
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    <h1>
      Choosing a JRE for a launch configuration
    </h1>
    <p>
      Instead of using the default JRE for running and debugging all <strong>Java Application</strong> launch configurations, you can specifically assign a JRE for launching an individual
      configuration.    </p>
    <ol>
      <li>
        With a Java Application configuration selected in the
        <a class="command-link" href='javascript:executeCommand("org.eclipse.debug.ui.commands.OpenRunConfigurations")'>
        <img src="PLUGINS_ROOT/org.eclipse.help/command_link.svg" alt="Opens the Launch Configuration dialog">
        <strong>Launch Configuration Dialog</strong></a>, select the JRE tab.
      </li>
      <li>
        In the list of available JREs, select the JRE you want to use to launch this configuration and click <strong>Apply</strong>, then <strong>Run</strong> or <strong>Debug</strong>.      </li>
    </ol>
    <p>
      <strong>Note</strong>: Changing the JRE used for running does not affect the way Java source is compiled. You can adjust the build path to compile against custom
      libraries.&nbsp;
    </p>
    
   <h3 class="related">Related concepts</h3>
      <a href="../concepts/concept-jdt.htm">Java development tools (JDT)</a>
   <h3 class="related">Related tasks</h3>
      <a href="../tasks/tasks-JREs.htm">Working with JREs</a><br>
      <a href="../tasks/task-add_new_jre.htm">Adding a new JRE definition</a><br>
      <a href="tasks-deleteJRE.htm">Deleting a JRE definition</a><br>
      <a href="../tasks/task-assign_default_jre.htm">Choosing a default JRE</a>
   <h3 class="related">Related references</h3>
      <a href="../reference/preferences/java/debug/ref-installed_jres.htm">Installed JREs preference page</a>
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